Harken 40mm Twing Block

Enhance your sailing setup with the 40mm Twin Block, engineered for superior performance and reliability on the water. Crafted from high-strength Carbo Air® materials, this lightweight and durable block ensures smooth and efficient sail handling, making it an essential component for dinghies, sport boats, and small keelboats.

Features

• Opening Side Plate: Easily rig and remove the block from the sheet, simplifying sail adjustments and setup.
• Spring-Biased Operation: Automatically opens when unlatched, allowing for effortless one-handed control during sail maneuvers.
• Pivot Base Roller: Offers 1:1 or 2:1 up-down control, providing versatile handling options tailored to various sailing conditions.
• Carbo Air® Construction: Combines high strength with a lightweight design, ensuring durability and maximum floatation in light airs for enhanced performance.

Applications

• Dinghies, sport boats, and small keelboats
• Spinnaker sheet and guy control
• Code zero sheet up-down control

Specifications

Specification	Details
Sheave Diameter	40 mm (1-9/16 in)
Length	89 mm (3-1/2 in)
Weight	86 g (3 oz)
Maximum Line Diameter	12 mm (3/8 in)
Maximum Working Load	275 kg (606 lb)
Breaking Load	825 kg (1818 lb)

Download the Owner's Manual (PDF)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.